Based on the Information Below, Answer the Following Question(s), Assuming

Multiple Choice

Based on the information below, answer the following question(s) , assuming complete dominance.
"In humans, a widow's peak is a dominant trait, and a straight hairline is a recessive trait."
-Cystic fibrosis is a genetic disorder that results from the inheritance of two recessive alleles. What is the chance that a child will inherit the disorder if one parent is heterozygous for this gene and one parent has cystic fibrosis?

A) 0%
B) 25%
C) 50%
D) 75%
E) 100%